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High Polishing Black Cobblestone

The main chemical components are silicon dioxide, followed by a small amount of iron oxide and trace elements such as manganese, copper, aluminum, magnesium and other compounds. They have different pigments, such as red red for iron, blue for copper, purple for manganese, yellow semitransparent...

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The main chemical components are silicon dioxide, followed by a small amount of iron oxide and trace

elements such as manganese, copper, aluminum, magnesium and other compounds. They have different

pigments, such as red red for iron, blue for copper, purple for manganese, yellow semitransparent as

We are one of the leading Gravel Stones manufacturers and suppliers in China. If you are interested in our high polishing black cobblestone, welcome to buy the quality glass products made in China from our factory. Cheap and low price and excellent service are available.